Surveillance footage shows David and Thomas Matusiewicz entering and leaving the parking garage before the shootings at the New Castle County Courthouse on Feb. 11.

http://www.wgrz.com/video/2178906226001/1/Surveillance-Matusiewiczes-in-parking-garage-before-courthouse-shootingshttp://download.gannett.edgesuite.net/newsjour/brightcove/29913743001/29913743001_2178850349001_900944612-168-1361404545658.jpg?pubId=29913743001Surveillance: Matusiewiczes in parking garage before courthouse shootingsSurveillance footage shows David and Thomas Matusiewicz entering and leaving the parking garage before the shootings at the New Castle County Courthouse on Feb. 11.CrimeWilmingtoncourtshootdelNews00:27